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7.1.1 When the RUN LED is not on
Check the following items.
If the above corrective actions do not solve the problem, perform the unit test (offline test) to check if the module has a
fault. ( Page 39, Section 4.3)
7.1.2 When the REM. LED is off or flashing
Check either of the following items that matches the current REM. LED status.
(1) When the REM. LED is off
When the REM. LED is off, check the status of the ERR. LED.
When the ERR. LED is off, the module is being initialized. When the initialization processing ends, the REM. LED
turns on.
When the ERR. LED is on, an error exists. Connect GX Developer and perform system monitoring. ( Page
89, Section 7.4.1 (2))
(2) When the REM. LED is flashing
Check either of the following items that matches the current interval of flashing.
(a) Interval of 1s
Parameters are being written to the module. When the write processing ends, the REM. LED turns on.
(b) Interval of 100ms
Forced input/output are being registered. Connect GX Developer and cancel the forced input/output
registration.
Check item Corrective action
Power is not supplied to the power supply module. Supply power to the power supply module.
The POWER LED of the power supply module is not on.
• The power supply module has failed. Replace the power
supply module.
• The overcurrent protection circuit is in its operation. Check
the current consumption of the modules mounted on the
base unit.
The MELSECNET/H remote I/O module has not been
properly mounted.
Mount the module to the base unit properly.